(TXT) View Source
       
       # COMPUTREND SYSTEMS, INC.
       
          ALI 486 NONCACHE
       
          Processor          80486SX/80487SX/80486DX/ODP486SX/80486DX2   
          Processor Speed    16/20/25/33/50(internal)/66(internal)       
          Chip Set           ALI                                         
          Max. Onboard DRAM  32MB                                        
          SRAM Cache         None                                        
          BIOS               AMI                                         
          Dimensions         220mm x 220mm                               
          I/O Options        Auxiliary keyboard connector                
          NPU Options        None                                        
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose         |  Location   | Purpose       |  Location  |
          |-----------------+-------------+---------------+------------|
          | Auxiliary       |     J1      | Turbo switch  | J4/pins 15 |
          | keyboard        |             |               |    - 17    |
          |-----------------+-------------+---------------+------------|
          | Power LED &     | J4/pins 1 - | Turbo LED     | J4/pins 12 |
          | keylock         |      5      |               |    & 13    |
          |-----------------+-------------+---------------+------------|
          | Speaker         | J4/pins 7 - | External      |     J3     |
          |                 |     10      | battery       |            |
          |-----------------+-------------+---------------+------------|
          | Reset switch    | J4/pins 19  |               |            |
          |                 |    & 20     |               |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | CMOS memory normal operation     |   J3   | connected  |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |   J3   | pins 3 & 4 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP1   |    open    |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select monochrome   |  JP2   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select color        |  JP2   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          |   CPU    | Location |  JP3   |  JP4  |  JP5  | JP6  | JP7  |
          |----------+----------+--------+-------+-------+------+------|
          | 80486DX2 |   PGA    |  open  | pins  | pins  | pins | pins |
          |          |          |        | 2 & 3 | 2 & 3 | 2 &  | 2 &  |
          |          |          |        |       |       |  3   |  3   |
          |----------+----------+--------+-------+-------+------+------|
          | ODP486SX |   PGA    |  open  | pins  | pins  | pins | pins |
          |          |          |        | 2 & 3 | 2 & 3 | 1 &  | 2 &  |
          |          |          |        |       |       |  2   |  3   |
          |----------+----------+--------+-------+-------+------+------|
          | 80486DX  |   PGA    |  open  | pins  | pins  | pins | pins |
          |          |          |        | 2 & 3 | 2 & 3 | 2 &  | 2 &  |
          |          |          |        |       |       |  3   |  3   |
          |----------+----------+--------+-------+-------+------+------|
          | 80487SX  |   PGA    |  open  | pins  | pins  | pins | pins |
          |          |          |        | 2 & 3 | 2 & 3 | 1 &  | 2 &  |
          |          |          |        |       |       |  2   |  3   |
          |----------+----------+--------+-------+-------+------+------|
          | 80486SX  |   PQFP   | closed | pins  | pins  | open | pins |
          |          |          |        | 1 & 2 | 1 & 2 |      | 1 &  |
          |          |          |        |       |       |      |  2   |
          |------------------------------------------------------------|
          | Note:Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             CPU SPEED/BUS SPEED CONFIGURATION              |
          |------------------------------------------------------------|
          |   CPU   |   Bus   |    JP8     |   JP9   |  JP10  |  JP11  |
          |  Speed  |  Clock  |            |         |        |        |
          |---------+---------+------------+---------+--------+--------|
          |  16MHz  |  SYS/4  | pins 2 & 3 | pins 2  | pins 1 | pins 2 |
          |         |         |            |   & 3   |  & 2   |  & 3   |
          |---------+---------+------------+---------+--------+--------|
          |  20MHz  |  SYS/5  | pins 2 & 3 | pins 1  | pins 1 | pins 2 |
          |         |         |            |   & 2   |  & 2   |  & 3   |
          |---------+---------+------------+---------+--------+--------|
          |  25MHz  |  SYS/6  | pins 1 & 2 | pins 2  | pins 1 | pins 2 |
          |         |         |            |   & 3   |  & 2   |  & 3   |
          |---------+---------+------------+---------+--------+--------|
          |  33MHz  |  SYS/8  | pins 1 & 2 | pins 1  | pins 1 | pins 2 |
          |         |         |            |   & 2   |  & 2   |  & 3   |
          |---------+---------+------------+---------+--------+--------|
          |  40MHz  |  SYS/5  | pins 2 & 3 | pins 1  | pins 2 | pins 1 |
          |         |         |            |   & 2   |  & 3   |  & 2   |
          |------------------------------------------------------------|
          | Note:Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       1MB        |    (4) 256K x 9    |        NONE        |
          |------------------+--------------------+--------------------|
          |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       4MB        |     (4) 1M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+